zap

Documentation

Overview

Package zap contains helpers for setting up a new logr.Logger instance using the Zap logging framework.

Package zap contains helpers for setting up a new logr.Logger instance using the Zap logging framework.

Index

• func ConsoleEncoder(opts ...EncoderConfigOption) func(o *Options)
• func Encoder(encoder zapcore.Encoder) func(o *Options)
• func JSONEncoder(opts ...EncoderConfigOption) func(o *Options)
• func Level(level zapcore.LevelEnabler) func(o *Options)
• func New(opts ...Opts) logr.Logger
• func NewRaw(opts ...Opts) *zap.Logger
• func RawZapOpts(zapOpts ...zap.Option) func(o *Options)
• func StacktraceLevel(stacktraceLevel zapcore.LevelEnabler) func(o *Options)
• type EncoderConfigOption
• type KubeAwareEncoder
  • func (k *KubeAwareEncoder) Clone() zapcore.Encoder
  • func (k *KubeAwareEncoder) EncodeEntry(entry zapcore.Entry, fields []zapcore.Field) (*buffer.Buffer, error)
• type NewEncoderFunc
• type Options
  • func (o *Options) BindFlags(fs *flag.FlagSet)
• type Opts
  • func UseDevMode(enabled bool) Opts
  • func UseFlagOptions(in *Options) Opts
  • func WriteTo(out io.Writer) Opts

Functions

func ConsoleEncoder

func ConsoleEncoder(opts ...EncoderConfigOption) func(o *Options)

ConsoleEncoder configures the logger to use a Console encoder.

func Encoder

func Encoder(encoder zapcore.Encoder) func(o *Options)

Encoder configures how the logger will encode the output e.g JSON or console. See Options.Encoder.

func JSONEncoder

func JSONEncoder(opts ...EncoderConfigOption) func(o *Options)

JSONEncoder configures the logger to use a JSON Encoder.

func Level

func Level(level zapcore.LevelEnabler) func(o *Options)

Level sets Options.Level, which configures the minimum enabled logging level e.g Debug, Info. A zap log level should be multiplied by -1 to get the logr verbosity. For example, to get logr verbosity of 3, pass zapcore.Level(-3) to this Opts. See https://pkg.go.dev/github.com/go-logr/zapr for how zap level relates to logr verbosity.

func New

func New(opts ...Opts) logr.Logger

New returns a brand new Logger configured with Opts. It uses KubeAwareEncoder which adds Type information and Namespace/Name to the log.

func NewRaw

func NewRaw(opts ...Opts) *zap.Logger

NewRaw returns a new zap.Logger configured with the passed Opts or their defaults. It uses KubeAwareEncoder which adds Type information and Namespace/Name to the log.

func RawZapOpts

func RawZapOpts(zapOpts ...zap.Option) func(o *Options)

RawZapOpts allows appending arbitrary zap.Options to configure the underlying zap logger. See Options.ZapOpts.

func StacktraceLevel

func StacktraceLevel(stacktraceLevel zapcore.LevelEnabler) func(o *Options)

StacktraceLevel sets Options.StacktraceLevel, which configures the logger to record a stack trace for all messages at or above a given level. See the Level Opts for the relationship of zap log level to logr verbosity.

Types

type EncoderConfigOption

type EncoderConfigOption func(*zapcore.EncoderConfig)

EncoderConfigOption is a function that can modify a `zapcore.EncoderConfig`.

type KubeAwareEncoder

type KubeAwareEncoder struct {
	// Encoder is the zapcore.Encoder that this encoder delegates to
	zapcore.Encoder

	// Verbose controls whether or not the full object is printed.
	// If false, only name, namespace, api version, and kind are printed.
	// Otherwise, the full object is logged.
	Verbose bool
}

KubeAwareEncoder is a Kubernetes-aware Zap Encoder. Instead of trying to force Kubernetes objects to implement ObjectMarshaller, we just implement a wrapper around a normal ObjectMarshaller that checks for Kubernetes objects.

func (*KubeAwareEncoder) Clone

func (k *KubeAwareEncoder) Clone() zapcore.Encoder

Clone implements zapcore.Encoder.

func (*KubeAwareEncoder) EncodeEntry

func (k *KubeAwareEncoder) EncodeEntry(entry zapcore.Entry, fields []zapcore.Field) (*buffer.Buffer, error)

EncodeEntry implements zapcore.Encoder.

type NewEncoderFunc

type NewEncoderFunc func(...EncoderConfigOption) zapcore.Encoder

NewEncoderFunc is a function that creates an Encoder using the provided EncoderConfigOptions.

type Options

type Options struct {
	// Development configures the logger to use a Zap development config
	// (stacktraces on warnings, no sampling), otherwise a Zap production
	// config will be used (stacktraces on errors, sampling).
	Development bool
	// Encoder configures how Zap will encode the output.  Defaults to
	// console when Development is true and JSON otherwise
	Encoder zapcore.Encoder
	// EncoderConfigOptions can modify the EncoderConfig needed to initialize an Encoder.
	// See https://pkg.go.dev/go.uber.org/zap/zapcore#EncoderConfig for the list of options
	// that can be configured.
	// Note that the EncoderConfigOptions are not applied when the Encoder option is already set.
	EncoderConfigOptions []EncoderConfigOption
	// NewEncoder configures Encoder using the provided EncoderConfigOptions.
	// Note that the NewEncoder function is not used when the Encoder option is already set.
	NewEncoder NewEncoderFunc
	// DestWriter controls the destination of the log output.  Defaults to
	// os.Stderr.
	DestWriter io.Writer
	// Level configures the verbosity of the logging.
	// Defaults to Debug when Development is true and Info otherwise.
	// A zap log level should be multiplied by -1 to get the logr verbosity.
	// For example, to get logr verbosity of 3, set this field to zapcore.Level(-3).
	// See https://pkg.go.dev/github.com/go-logr/zapr for how zap level relates to logr verbosity.
	Level zapcore.LevelEnabler
	// StacktraceLevel is the level at and above which stacktraces will
	// be recorded for all messages. Defaults to Warn when Development
	// is true and Error otherwise.
	// See Level for the relationship of zap log level to logr verbosity.
	StacktraceLevel zapcore.LevelEnabler
	// ZapOpts allows passing arbitrary zap.Options to configure on the
	// underlying Zap logger.
	ZapOpts []zap.Option
	// TimeEncoder specifies the encoder for the timestamps in log messages.
	// Defaults to RFC3339TimeEncoder.
	TimeEncoder zapcore.TimeEncoder
}

Options contains all possible settings.

func (*Options) BindFlags

func (o *Options) BindFlags(fs *flag.FlagSet)

BindFlags will parse the given flagset for zap option flags and set the log options accordingly:

• zap-devel: Development Mode defaults(encoder=consoleEncoder,logLevel=Debug,stackTraceLevel=Warn) Production Mode defaults(encoder=jsonEncoder,logLevel=Info,stackTraceLevel=Error)
• zap-encoder: Zap log encoding (one of 'json' or 'console')
• zap-log-level: Zap Level to configure the verbosity of logging. Can be one of 'debug', 'info', 'error', or any integer value > 0 which corresponds to custom debug levels of increasing verbosity").
• zap-stacktrace-level: Zap Level at and above which stacktraces are captured (one of 'info', 'error' or 'panic')
• zap-time-encoding: Zap time encoding (one of 'epoch', 'millis', 'nano', 'iso8601', 'rfc3339' or 'rfc3339nano'), Defaults to 'epoch'.

type Opts

type Opts func(*Options)

Opts allows to manipulate Options.

func UseDevMode

func UseDevMode(enabled bool) Opts

UseDevMode sets the logger to use (or not use) development mode (more human-readable output, extra stack traces and logging information, etc). See Options.Development.

func UseFlagOptions

func UseFlagOptions(in *Options) Opts

UseFlagOptions configures the logger to use the Options set by parsing zap option flags from the CLI.

opts := zap.Options{}
opts.BindFlags(flag.CommandLine)
flag.Parse()
log := zap.New(zap.UseFlagOptions(&opts))

func WriteTo

func WriteTo(out io.Writer) Opts

WriteTo configures the logger to write to the given io.Writer, instead of standard error. See Options.DestWriter.